Our this Titanium topper seat post which is use for topper use.
also can't adjustable, the ID size is 32mm.
All our titanium bike products can be custom, if you need make some pls contact us:
email: firstname.lastname@example.org Skype: alisa.huo
Whatsapp: +86 18291934244 wechat: wx648713976
Sample pictures showing: